--- a+++ b/src/runtime/wrap.c@@ -0,0 +1,102 @@+/*+ * wrappers around low-level operations to provide a simpler interface+ * to the operations that Lisp needs+ *+ * The functions in this file are typically called directly from Lisp.+ * Thus, when their signature changes, they don't need updates in a .h+ * file somewhere, but they do need updates in the Lisp code. FIXME:+ * It would be nice to enforce this at compile time. It mighn't even+ * be all that hard: make the cross-compiler versions of DEF-ALIEN-FOO+ * macros accumulate strings in a list which then gets written out at+ * the end of sbcl2.h at the end of cross-compilation, then rerun+ * 'make' in src/runtime/ using the new sbcl2.h as sbcl.h (and make+ * sure that all the files in src/runtime/ include sbcl.h). */++/*+ * This software is part of the SBCL system. See the README file for+ * more information.+ *+ * This software is derived from the CMU CL system, which was+ * written at Carnegie Mellon University and released into the+ * public domain. The software is in the public domain and is+ * provided with absolutely no warranty. See the COPYING and CREDITS+ * files for more information.+ */++#include <sys/types.h>+#include <dirent.h>+#include <string.h>++#include "util.h"+ +/*+ * stuff needed by CL:DIRECTORY and other Lisp directory operations+ */++/* Unix directory operations think of "." and ".." as filenames, but+ * Lisp directory operations do not. */+int+is_lispy_filename(const char *filename)+{+ return strcmp(filename, ".") && strcmp(filename, "..");+}++/* Return a zero-terminated array of strings holding the Lispy filenames+ * (i.e. excluding the Unix magic "." and "..") in the named directory. */+char**+alloc_directory_lispy_filenames(const char *directory_name)+{+ DIR *dir_ptr;+ char **result = 0;++ if (dir_ptr = opendir(directory_name)) { /* if opendir success */++ struct voidacc va;++ if (0 == voidacc_ctor(&va)) { /* if voidacc_ctor success */+ struct dirent *dirent_ptr;++ while (dirent_ptr = readdir(dir_ptr)) { /* until end of data */+ char* original_name = dirent_ptr->d_name;+ if (is_lispy_filename(original_name)) {+ /* strdup(3) is in Linux and *BSD. If you port+ * somewhere else that doesn't have it, it's easy+ * to reimplement. */+ char* dup_name = strdup(original_name);+ if (!dup_name) { /* if strdup failure */+ goto dtors;+ }+ if (voidacc_acc(&va, dup_name)) { /* if acc failure */+ goto dtors; + }+ }+ }+ result = (char**)voidacc_give_away_result(&va);+ }++ dtors:+ voidacc_dtor(&va);+ /* ignoring closedir(3) return code, since what could we do?+ *+ * "Never ask questions you don't want to know the answer to."+ * -- William Irving Zumwalt (Rich Cook, _The Wizardry Quested_) */+ closedir(dir_ptr);+ }++ return result;+}++/* Free a result returned by alloc_directory_lispy_filenames. */+void+free_directory_lispy_filenames(char** directory_lispy_filenames)+{+ char** p;++ /* Free the strings. */+ for (p = directory_lispy_filenames; *p; ++p) {+ free(*p);+ }++ /* Free the table of strings. */+ free(directory_lispy_filenames);+}